IPPLM

Warsaw, Poland
Warsaw, Poland

Time filter

Source Type

Lerche E.,Laboratory for Plasma Physics Brusells | Lerche E.,EURATOM | Lerche E.,Culham Center for Fusion Energy | Goniche M.,French Atomic Energy Commission | And 59 more authors.
Nuclear Fusion | Year: 2016

Ion cyclotron resonance frequency (ICRF) heating has been an essential component in the development of high power H-mode scenarios in the Jet European Torus ITER-like wall (JET-ILW). The ICRF performance was improved by enhancing the antenna-plasma coupling with dedicated main chamber gas injection, including the preliminary minimization of RF-induced plasma-wall interactions, while the RF heating scenarios where optimized for core impurity screening in terms of the ion cyclotron resonance position and the minority hydrogen concentration. The impact of ICRF heating on core impurity content in a variety of 2.5 MA JET-ILW H-mode plasmas will be presented, and the steps that were taken for optimizing ICRF heating in these experiments will be reviewed. © 2016 EURATOM.


Goniche M.,French Atomic Energy Commission | Jacquet P.,Culham Center for Fusion Energy | Van Eester D.,Laboratory for Plasma Physics Brusells | Bobkov V.,Max Planck Institute for Plasma Physics (Garching) | And 15 more authors.
Journal of Nuclear Materials | Year: 2015

Recent JET-ILW [1,2] experiments reiterated the importance of tuning the plasma fuelling in order to optimize ion cyclotron resonance frequency (ICRF) heating in high power H-mode discharges. By fuelling the plasma from gas injection modules (GIMs) located in the mid-plane and on the top of the machine instead of adopting the more standardly used divertor GIMs, a considerable increase of the ICRF antenna coupling resistances was achieved with moderate gas injection rates (<1.5 × 1022 e/s). This effect is explained by an increase of the scrape-off-layer density in front of the antennas when mid-plane and top fuelling is used. By distributing the gas injection to optimize the coupling of all ICRF antenna arrays simultaneously, a substantial increase in the ICRF power capability and reliability was attained. Although similar core/pedestal plasma properties were observed for the different injection cases, the experiments indicate that the RF-induced impurity sources are reduced when switching from divertor to main chamber gas injection. © 2014 Elsevier B.V.


Batani D.,French Atomic Energy Commission | Batani D.,University of Milan Bicocca | Koenig M.,Ecole Polytechnique - Palaiseau | Baton S.,Ecole Polytechnique - Palaiseau | And 32 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2011

This paper presents the goals and some of the results of experiments conducted within the Working Package 10 (Fusion Experimental Programme) of the HiPER Project. These experiments concern the study of the physics connected to "Advanced Ignition Schemes", i.e. the Fast Ignition and the Shock Ignition Approaches to Inertial Fusion. Such schemes are aimed at achieving a higher gain, as compared to the classical approach which is used in NIF, as required for future reactors, and making fusion possible with smaller facilities. In particular, a series of experiments related to Fast Ignition were performed at the RAL (UK) and LULI (France) Laboratories and were addressed to study the propagation of fast electrons (created by a short-pulse ultra-high-intensity beam) in compressed matter, created either by cylindrical implosions or by compression of planar targets by (planar) laser-driven shock waves. A more recent experiment was performed at PALS and investigated the laser-plasma coupling in the 1016 W/cm2 intensity regime of interest for Shock Ignition. © 2011 SPIE.


Batani D.,French National Center for Scientific Research | Batani D.,Czech Technical University | Malka G.,French National Center for Scientific Research | Schurtz G.,French National Center for Scientific Research | And 35 more authors.
Journal of Physics: Conference Series | Year: 2012

Shock ignition (SI) is a new approach to Inertial Confinement Fusion (ICF) based on decoupling the compression and ignition phase. The last one relies on launching a strong shock through a high intensity laser spike (≤ 10 16 W/cm2) at the end of compression. In this paper, first we described an experiment performed using the PALS iodine laser to study laser-target coupling and laser-plasma interaction in an intensity regime relevant for SI. A first beam with wavelength λ = 1.33 μm and low intensity was used to create an extended preformed plasma, and a second one with λ = 0.44 μm to create a strong shock. Several diagnostics characterized the preformed plasma and the interaction of the main pulse. Pressure up to 90 Mbar was inferred. In the last paper of the paper, we discuss the relevant steps, which can be followed in order to approach the demonstration of SI on laser facilities like LMJ.


Jaboulay J.-C.,CEA Saclay Nuclear Research Center | Damian F.,CEA Saclay Nuclear Research Center | Aiello G.,CEA Saclay Nuclear Research Center | Taylor D.,Culham Center for Fusion Energy | And 6 more authors.
Fusion Engineering and Design | Year: 2015

This paper presents the status of different Monte Carlo (MC) particle transport codes regarding their capabilities to model the European fusion power demonstration reactor (DEMO). This work was carried out, via a collaboration between CEA, CCFE, IPPLM and KIT to evaluate MC codes which could replace MCNP for nuclear analysis on DEMO. Each association has participated using a different MC code: CEA with TRIPOLI-4, CCFE with Serpent, and IPPLM with FLUKA. The common DEMO model studied has been developed by KIT with MCNP. Considerable effort was required to translate the MCNP input deck into the syntax of Serpent and FLUKA codes; so no real nuclear analysis has been performed in the frame of this work. Regarding TRIPOLI-4, a benchmark has been successfully conducted; the results obtained are statistically similar to those of MCNP with comparable computation times. © 2015 Elsevier B.V.


Kortanek J.,Czech Technical University | Kubes P.,Czech Technical University | Kravarik J.,Czech Technical University | Rezac K.,Czech Technical University | And 6 more authors.
Physica Scripta | Year: 2014

The unique diagnostic system at the plasma focus PF-1000 at the IPPLM in Warsaw, operating at 2 MA and 1011 neutron yield, provides interferometry, x-ray, magnetic probes and neutron diagnostics together with registration of the voltage, current and its time derivative. With these diagnostic data we determined the boundaries of the dense plasma column from the interferograms and calculated the inductance for a single shot. The value of the current, voltage, current derivative, inductance and its derivative enabled calculation of the energy delivered to the pinch and energy released by the change of the inductance. The energy released during the expansion of the constriction was compared with the energy needed for acceleration of the deuterons producing neutrons calculated from the neutron pulse registered during and after the constriction expansion. The energy released by the expansion of the constriction is sufficient for deuteron acceleration. © 2014 The Royal Swedish Academy of Sciences.


Krauz V.,RAS Research Center Kurchatov Institute | Mitrofanov K.,SRC RF TRINITI | Scholz M.,IPPLM | Paduch M.,IPPLM | And 3 more authors.
Plasma Physics and Controlled Fusion | Year: 2012

The results of studies of the plasma-current sheath structure on the PF-1000 facility in the stage close to the instant of pinch formation are presented. The measurements were performed using various modifications of the calibrated magnetic probes. Studies of the influence of the probe shape and dimensions on the measurements accuracy were done. The current flowing in the converging sheath at a distance of 40mm from the axis of the facility electrodes was measured. In the optimal operating modes, this current is equal to the total discharge current, which indicates the high efficiency of current transportation toward the axis. In such shots a compact high-quality sheath forms with shock wave in front of the magnetic piston. It is shown that the neutron yield depends on the current compressed onto the axis. This dependence agrees well with the known scaling, YnI ∼ 4. The use of the total discharge current in constructing the current scaling, especially for facilities with a large stored energy, is unjustified. © 2012 IOP Publishing Ltd.


Krauz V.,RAS Research Center Kurchatov Institute | Mitrofanov K.,RAS Research Center Kurchatov Institute | Scholz M.,IPPLM | Kubes P.,CPTU | And 8 more authors.
Problems of Atomic Science and Technology | Year: 2013

The recent results of studies of the magnetic field distribution and the neutron yield scaling in two largest plasma focus facilities, PF-3 and PF-1000 is done. The power-law dependence of the neutron yield on the current in the imploding plasma sheath has been demonstrated experimentally. For the first time the presence of the z magnetic field components is experimentally shown. In the compression stage, the axial component of the magnetic field reaches several kG that comprises ~10 % of the azimuthal component. The presence of the Bz field is a powerful argument in favor of the existence of closed magnetic configurations, which play an important role in the generating of neutrons.


Batani D.,French Atomic Energy Commission | Koenig M.,Ecole Polytechnique - Palaiseau | Baton S.,Ecole Polytechnique - Palaiseau | Perez F.,Ecole Polytechnique - Palaiseau | And 28 more authors.
Plasma Physics and Controlled Fusion | Year: 2011

This paper presents the goals and some of the results of experiments conducted within the Working Package 10 (Fusion Experimental Programme) of the HiPER Project. These experiments concern the study of the physics connected to 'advanced ignition schemes', i.e. the fast ignition and the shock ignition approaches to inertial fusion. Such schemes are aimed at achieving a higher gain, as compared with the classical approach which is used in NIF, as required for future reactors, and make fusion possible with smaller facilities. In particular, a series of experiments related to fast ignition were performed at the RAL (UK) and LULI (France) Laboratories and studied the propagation of fast electrons (created by a short-pulse ultra-high-intensity beam) in compressed matter, created either by cylindrical implosions or by compression of planar targets by (planar) laser-driven shock waves. A more recent experiment was performed at PALS and investigated the laser-plasma coupling in the 10 16 W cm -2 intensity regime of interest for shock ignition. © 2011 IOP Publishing Ltd.

Loading IPPLM collaborators
Loading IPPLM collaborators